| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,674 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,727,650 |
| Vietnam War Countries | 0 | - | 4.82 | 94,681 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,641 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,703 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,874 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,901 |
| American Revolution Decoder | 0 | - | 4.12 | 20,995 |
| Modern Day Countries of Nazi Germany on a Map | 0 | - | 4.97 | 145,902 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,281 |
| Random U.S. States on a Map | 0 | - | 4.96 | 630,684 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.89 | 113,503 |
| Pixelated United States Map | 0 | - | 4.88 | 94,847 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,586 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,383 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,679 |
| Presidential Middle Names | 0 | - | 4.41 | 60,754 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,710 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,913 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,641 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,815 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,845 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,224 |
| U.S. President Scramble | 0 | - | 4.40 | 117,496 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,614 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,945 |
| Biggest Cities in the Confederate States in 1860 | 0 | - | 4.41 | 23,724 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,327 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 304,047 |
| Countries of the German Empire | 0 | - | 4.51 | 38,269 |
| United States Map Quiz | 0 | - | 4.98 | 4,172,187 |
| U.S. Vice Presidents | 0 | - | 4.39 | 137,077 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,373 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,785 |
| First Ladies of the United States | 0 | - | 4.28 | 85,998 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,077 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,325 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,503 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,370 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,105 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.31 | 59,276 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,953 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 162,416 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,787 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,998 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,613 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,288 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,235 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,935 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,359 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,095 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,573 |
| Countries of Europe After World War II | 0 | - | 4.99 | 189,512 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 157,568 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 104,636 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,912 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,524 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,867 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,459 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,981 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,613 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,678 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 335,717 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,124 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 636,236 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,148 |
| The George Washington Presidency | 0 | - | 4.03 | 14,616 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,784 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,761 |
| The John Adams Presidency | 0 | - | 4.12 | 8,795 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,993 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,780 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,386 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,766 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,936 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,068 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,761 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,289 |
| US States Quiz | 0 | - | 5.00 | 17,005,469 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,755 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,439 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,670 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,870 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 71,916 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,632 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,996 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,869 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,592 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,531 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,306 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,412 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,616 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,487 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,285 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,741 |
| U.S. Bill of Rights | 0 | - | 4.53 | 32,605 |
| Presidential Actors | 0 | - | 4.36 | 19,259 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,546 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,558 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,896 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,102 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,513 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,620 |
| Events in U.S. History | 0 | - | 4.41 | 28,833 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,205 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,437 |
| The American Civil War | 0 | - | 4.62 | 52,640 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,115 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 510,420 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,332 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,356 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,405 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,433 |
| U.S. States By Population | 0 | - | 4.92 | 154,193 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,286 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,924 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,355 |
| US States with an Empty Map | 0 | - | 5.00 | 629,031 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,112 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,896 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,556 |
| Draw All US State Borders | 0 | - | 4.99 | 141,177 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,138 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 161,093 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,267 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,719 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,848 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,677 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,515 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,060 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 68,011 |
| Every European Country Shape | 0 | - | 4.96 | 203,104 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,245 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,461 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,520 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,848 |
| Countries of the Italian Empire | 0 | - | 4.21 | 27,839 |
| The Dictator Files: Benito Mussolini | 0 | - | 4.65 | 23,577 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,713 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,439 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,919 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,123 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,468 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,647 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,563 |
| The Iraq War | 0 | - | 4.47 | 15,707 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,057 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,871 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 90,013 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,751 |
| Every African Country Shape | 0 | - | 4.90 | 88,459 |
| Former Country Flag-Shape Picture Quiz | 0 | - | 4.98 | 90,258 |
| Countries in an Egg of the World Map | 0 | - | 4.91 | 65,037 |
| Random American Countries on a Map | 0 | - | 4.96 | 100,421 |
| South America Flags Map Quiz | 0 | - | 4.95 | 89,023 |
| Rivers of the United States | 0 | - | 4.93 | 66,721 |
| Names of Generations | 0 | - | 4.09 | 45,551 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,740 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,304 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,760 |
| Topological Map of the USA Quiz | 0 | - | 4.49 | 29,296 |
| U.S. Senators by State | 0 | - | 4.44 | 40,113 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,831 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,704 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,457 |
| American Founding Fathers | 0 | - | 4.42 | 23,275 |
| The American Revolution | 0 | - | 4.52 | 54,367 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,190 |
| Stephen Curry Quiz | 0 | - | 4.37 | 67,365 |
| History of Florida | 0 | - | 4.45 | 9,874 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,141 |
| Hawaiian Islands | 0 | - | 4.83 | 42,968 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,639 |
| Harvard University | 0 | - | 4.15 | 8,333 |
| History of Texas | 0 | - | 4.43 | 14,689 |
| LeBron James Trivia | 0 | - | 4.01 | 171,790 |
| LeBron... or Kobe? | 0 | - | 4.04 | 70,512 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,532 |
| Washington D.C. by Picture | 0 | - | 4.49 | 26,864 |
| American History Quotes #1 | 0 | - | 4.37 | 96,213 |
| People on Money - United States | 0 | - | 4.31 | 63,439 |
| American History Quotes #2 | 0 | - | 4.38 | 41,513 |
| Old West History | 0 | - | 4.34 | 15,307 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,595 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,237 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,536 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,988 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,789 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,348 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,556,587 |
| U.S. State Flags | 0 | - | 4.89 | 173,129 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,810 |
| U.S. States by Church Attendance | 0 | - | 4.59 | 32,567 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,641 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,551 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,681 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 50,157 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,917 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,570 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,909 |
